Sonata\Component\Payment\BasePaypal::encryptViaFile PHP Method

    public function encryptViaFile($hash)
    {
        $this->checkPaypalFiles();
        $key_file = $this->getOption('key_file');
        $cert_file = $this->getOption('cert_file');
        $openssl = $this->getOption('openssl');
        $paypal_cert_file = $this->getOption('paypal_cert_file');
        // create tmp file
        $filename = tempnam(sys_get_temp_dir(), 'sonata_paypal_');
        $contents = '';
        foreach ($hash as $name => $value) {
            $contents .= $name . '=' . $value . "\n";
        }
        if (!@file_put_contents($filename, $contents)) {
            if ($this->getLogger()) {
                $this->getLogger()->emergency(sprintf('encryptViaFile, unable to create buffer file : %s', $filename));
            }
            throw new \RuntimeException(sprintf('unable to create buffer file : %s', $filename));
        }
        $openssl_cmd = "{$openssl} smime -sign -signer {$cert_file} -inkey {$key_file} -outform der -nodetach -binary " . " < {$filename} " . " | {$openssl} smime -encrypt " . "-des3 -binary -outform pem {$paypal_cert_file}";
        if ($this->getLogger()) {
            $this->getLogger()->debug(sprintf('[BasePaypalPayment::encryptViaFile] command line=%s', $openssl_cmd));
        }
        $output = shell_exec($openssl_cmd);
        if (!@unlink($filename)) {
            if ($this->getLogger()) {
                $this->getLogger()->emergency(sprintf('[BasePaypalPayment::encryptViaFile] unable to delete temporary file, %s', $filename));
            }
        }
        return $output;
    }